up to

idi

a) as far as:

I am up to the eighth lesson[/ex]

b) in fulfillment of:

I couldn't live up to their expectations[/ex]

c) as many as; to the limit of:

up to five persons[/ex]

d) capable of; equal to:

Is he up to the job?[/ex]

e) incumbent upon:

It's up to you to tell her[/ex]

f) engaged in; doing:

What have you been up to lately?[/ex]